The StitchMaster Shuttle Kit includes a durable metal shuttle case and five shuttle bobbins, designed for use with a variety of treadle sewing machines. The shuttle case, part number 83505, and the bobbins, part number 8228, are compatible with numerous models, including 27-1 through 27-4, 27K-1 through 27K-4, 28-1 through 28-9, 28K series, and several 127 and 128 series models. Crafted from metal, these components ensure reliable performance and longevity. The kit features bobbins that stop spinning faster, preventing unraveling or tangling of the bobbin thread when sewing operations are paused or resumed. The package includes one shuttle case and five shuttle bobbins, providing essential accessories for maintaining smooth sewing operations. This multifunctional kit is ideal for sewing enthusiasts seeking to enhance their machine's functionality and ensure consistent, trouble-free stitching.